US4428163A - Shaping machine - Google Patents

Shaping machine Download PDF

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Publication number
US4428163A
US4428163A US06/300,980 US30098081A US4428163A US 4428163 A US4428163 A US 4428163A US 30098081 A US30098081 A US 30098081A US 4428163 A US4428163 A US 4428163A
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US
United States
Prior art keywords
plate
spindle
machine
rotation
struts
Prior art date
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Expired - Fee Related
Application number
US06/300,980
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English (en)
Inventor
Gerard Deschatrettes
Rene Tirel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Glaenzer Spicer SA
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Individual
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Publication date
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Assigned to GLAENZER SPICER reassignment GLAENZER SPICER ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GERARD, DEYCHATRETTER, TIREL, RENE
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/34—Relative movement obtained by use of deformable elements, e.g. piezoelectric, magnetostrictive, elastic or thermally-dilatable elements
    • B23Q1/36—Springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B17/00—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/02—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only
    • B24B17/025—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only for grinding rotating workpieces (three dimensional)
    • B24B17/026—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only for grinding rotating workpieces (three dimensional) for the periphery of plane workpieces, e.g. cams, lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/56—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load

Definitions

  • the present invention relates to shaping machines and in particular grinding machines. It is more particularly applicable to machines for grinding the trunnions of tripod elements for homokinetic joints.
  • An object of the present invention is to improve these connecting means so that they ensure a radial displacement of the workpiece-carrying plate in a direction exactly parallel to itself in the course of its rotation so as to precisely shape the workpiece which are fixed in an eccentric position on such plate.
  • the present invention provides a shaping machine of the type comprising a rotary spindle driven by a motor, a workpiece-carrying plate perpendicular to the axis of the spindle, radially elastically yieldable connecting means between the plate and the spindle, means for radially biasing the plate in the course of the rotation thereof, and means for maintaining a workpiece to be shaped in a position coaxial to the plate, wherein the elastically yieldable connecting means comprise a series of radially elastically yieldable struts which are parallel to the axis and are arranged about the axis.
  • each strut has, in the body part thereof a substantially constant diameter, and, adjacent each end, an enlarged portion which forms a shoulder and is extended by a screwthreaded axial rod whose diameter is between the diameter of the body portion of the strut and the diameter of the shoulder.
  • FIG. 1 is a diagrammatic view of a part of a shaping machine according to the invention, taken in section along line 1--1 of FIG. 4;
  • FIG. 2 is a corresponding view in longitudinal section after rotation of the plate thrugh a quarter of a rotation
  • FIG. 3 is a sectional view taken along line 3--3 of FIG. 2;
  • FIG. 4 diagrammatically illustrates a shaping machine according to the invention.
  • FIG. 5 is a sectional view taken along line 5--5 of FIG. 4.
  • a workpiece (not shown) comprises a cylindrical surface whose axis coincides with the axis X--X of a workpiece carrying plate 1.
  • the manner in which the workpiece is maintained so as to achieve this coaxial relationship is not critical and has not been illustrated in FIGS. 1 to 3.
  • the workpiece may be fixed in an eccentric or overhanging position on the plate 1.
  • the plate 1 is formed by a planar disc of constant thickness which carries a peripheral cylindrical cam 2 whose profile deviates slightly from the circular shape in order to have an elliptical shape. Near to the periphery of the plate, there are provided three axially extending apertures 3 which are equally spaced apart about the axis X--X and are counterbored adjacent the side on which the workpiece to be shaped is placed on the plate.
  • a rotary spindle 4 which is connected to the output shaft of a drive unit (not shown in FIGS. 1 to 3), comprises a planar end disc 5 which is parallel to the disc 1 and provided with three axially extending apertures 6 in alignment with the apertures 3 and counterbored at the end opposed to the apertures 3.
  • the plate 1 is connected to the disc 5 by three elastically yieldable small pillars or struts 7, for example of steel.
  • Each pillar has a cylindrical body portion 8 of constant diameter and is enlarged adjacent each end into a foot portion 9 defining a radially extending shoulder 10 whose diameter exceeds the diameter of the apertures 3 and 6.
  • the pillar is extended beyond each shoulder 10 by a portion of a smooth rod 11 which has a screwthreaded end portion and whose diameter is between the diameter of the body portion 8 and the diameter of the shoulder 10.
  • Each rod portion is inserted without clearance in a respective aperture 3 or 6. Its smooth portion is located in this aperture and the screwthreaded portion projects into the corresponding counterbore. A nut 12 screwthreadedly engaged on this screwthreaded portion and received in the counterbore completes the fixing of the considered rod portion 11.
  • a cylindrical roller 13 rolls along the periphery of the cam 2. This roller is journalled on a spindle 14 which is parallel to the axis X--X and is carried adjacent one end of a flexible and elastically yieldable strip 15. The other end of the strip 15 is fixed to the frame of the machine and the effective length of the strip may be adjusted by adjusting means (not shown).
  • the axis Y--Y of the spindle 4 is fixed.
  • this spindle rotates, it drives the plate 1 in rotation through the pillars 7 so that the roller 13 rolls along the parts of variable radius of the cam 2.
  • FIGS. 2 and 3 illustrate the maximum displacement of the axis X--X in a very exaggerated manner.
  • this plate moves in practice in an exactly radial direction parallel to itself without rotation or inclination of the plate relative to the spindle 4.
  • the pillars 7 in particular ensure a uniform elasticity of the assembly in all radial directions of the plate.
  • the described blocking provides considerable rigidity of the fixing of the foot portions 9 and eliminates any sliding, even micrometric sliding, in this region. Further, with the aforementioned ratio between the elasticities, the radial elasticity of the plate relative to the disc 5 may be made to be free of any hysteresis and its displacement may be perfectly proportional to and colinear with the radial force F developed by the contact of the roller 13 against the periphery of the cam 2.
  • the plate When it moves radially, the plate remains perfectly parallel to the starting position and consequently the surface to be ground remains exactly parallel to the axis of rotation of the spindle 4 of the machine and it is possible to obtain the desired mathematically cylindrical profile with high precision.
  • FIGS. 4 and 5 illustrate the application of the invention to a double grinding machine, without centre of the trunnions of tripod elements for homokinetic joints.
  • two spindles 4, 4a having the same axis Y--Y are provided, each spindle having however individual means for achieving a slow displacement thereof in the course of the grinding toward the axis Z--Z of a double grinding wheel 16 and a rapid return, the grinding wheels being provided with rapid feeding and return means.
  • Each plate 1, 1a carries a bracket 17 on which a tripod element 18 is releasably fixed by its hub 19 by means of an expansible inner clamp 20 actuated by linkage 21 and by a single-acting cylinder device 22 which are mounted on the plate but not shown in FIG. 1.
  • the precise positioning of the tripod element 18, so that each trunnion 23 to be ground is brought is succession to a position which is perfectly coaxial to the associated plate 1, 1a is ensured by orienting means 24 (not shown in FIG. 4) comprising three radial inverted V-shaped recesses 25 which are arranged 120° apart.
  • These means 24 are floatably mounted at the lower end of an indexing mechanism 26 carried by an upwardly withdrawable arm 27 actuated by a rack and pinion system 28.
  • each spindle 4, 4a The return of each spindle 4, 4a to its starting position is initiated by an electric gauge 29 which bears against the trunnion in the course of the grinding. Suitable automatic devices control the stopping of the spindles 4, the release of the finished workpieces, the loading, the positioning and the blocking of the new workpieces, the starting up of the workpiece-carrying spindles, etcetera.
  • FIGS. 4 and 5 The machine shown in FIGS. 4 and 5 is identical to that described in detail in the French patent application No. 80 20 805 filed on the same day by the Applicant, apart from the elastically yieldable connection by means of three pillars between each workpiece carrying plate 1, 1a and the corresponding spindle 4, 4a.
  • more than three pillars may be provided equally spaced apart circumferentially between each plate and its spindle, although the use of three pillars is preferred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US06/300,980 1980-09-29 1981-09-09 Shaping machine Expired - Fee Related US4428163A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020807 1980-09-29
FR8020807A FR2490987A1 (fr) 1980-09-29 1980-09-29 Machine a profiler

Publications (1)

Publication Number Publication Date
US4428163A true US4428163A (en) 1984-01-31

Family

ID=9246360

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/300,980 Expired - Fee Related US4428163A (en) 1980-09-29 1981-09-09 Shaping machine

Country Status (11)

Country Link
US (1) US4428163A (enrdf_load_stackoverflow)
JP (1) JPS57189769A (enrdf_load_stackoverflow)
BR (1) BR8106116A (enrdf_load_stackoverflow)
DD (1) DD201862A5 (enrdf_load_stackoverflow)
DE (1) DE3138571C2 (enrdf_load_stackoverflow)
ES (1) ES8300553A1 (enrdf_load_stackoverflow)
FR (1) FR2490987A1 (enrdf_load_stackoverflow)
GB (1) GB2091145B (enrdf_load_stackoverflow)
IT (1) IT1145120B (enrdf_load_stackoverflow)
MX (1) MX152797A (enrdf_load_stackoverflow)
SU (1) SU1019995A3 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1249857B (it) * 1991-10-23 1995-03-28 Meccanodora S R L Rettificatrice per la rettifica di tripodi di giunti omocinetici.
DE102008038728A1 (de) * 2008-08-12 2010-02-18 J.G. WEISSER SöHNE GMBH & CO. KG Fertigungsmaschine für unrunde Werkstücke
CN111590455A (zh) * 2020-06-03 2020-08-28 肖国辉 一种钢管内抛光加工装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB391437I5 (enrdf_load_stackoverflow) 1973-08-24 1975-01-28

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE220075C (enrdf_load_stackoverflow) *
US1660291A (en) * 1924-07-14 1928-02-21 Birkigt Marc Grinding machine
FR1401983A (fr) * 1964-02-04 1965-06-11 Glaenzer Spicer Sa Perfectionnements aux machines à profiler
DE1953933B2 (de) * 1969-10-27 1972-03-02 Gaillard, Georges Emile, Montmorency (Frankreich) Elastische kupplung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB391437I5 (enrdf_load_stackoverflow) 1973-08-24 1975-01-28

Also Published As

Publication number Publication date
IT8168250A0 (it) 1981-09-28
MX152797A (es) 1986-06-06
GB2091145B (en) 1983-09-28
SU1019995A3 (ru) 1983-05-23
ES505144A0 (es) 1982-12-01
DE3138571A1 (de) 1982-04-15
GB2091145A (en) 1982-07-28
JPH0141472B2 (enrdf_load_stackoverflow) 1989-09-05
DE3138571C2 (de) 1984-10-18
BR8106116A (pt) 1982-06-15
JPS57189769A (en) 1982-11-22
ES8300553A1 (es) 1982-12-01
FR2490987A1 (fr) 1982-04-02
DD201862A5 (de) 1983-08-17
IT1145120B (it) 1986-11-05
FR2490987B1 (enrdf_load_stackoverflow) 1982-11-19

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